Diisopropylethylamine → tert-Butyl 1-(4-(3-(4-fluorophenylamino)-3-oxopropanamido)phenyl)-1H-pyrrolo[3,2-c]pyridin-4-ylcarbamate

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Reaction Steps

A solution of tert-butyl 1-(4-aminophenyl)-1H-pyrrolo[3,2-c]pyridin-4-ylcarbamate (27 mg, 0.083 mmol, Compound B of Example 1) in DMF (1 mL) was treated with 3-(4-fluorophenylamino)-3-oxopropanoic acid (25 mg, 0.13 nmol), DIPEA (21 μL, 0.13 mmol) and TBTU (40 mg, 0.13 mmol) and the mixture stirred at RT for 16 h. The mixture was concentrated in vacuo to remove the DMF and the residue was partitioned between EtOAc (2 mL) and saturated sodium bicarbonate solution (2 mL). The EtOAc phase was washed with 10% aqueous LiCl (2 mL), brine (2 mL), dried (MgSO4) and concentrated in vacuo. The crude product was purified using a Chromatotron (1 mm SiO2 GF rotor, 2-5% MeOH-CHCl3 gradient elution) to give the title compound (37 mg, 88%) as an off-white solid. LCMS (ESI+) m/z 504 (M+H)+; HPLC tR=3.49 min.

Provenance & Evidence